Unit Test — Unit test Answers
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21
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Which graph represents a function with a rate of change of 0.5?
A
On a coordinate plane, a line with negative slope goes through points (negative 1, 1) and (0, negative 1).
B
On a coordinate plane, a line with negative slope goes through points (negative 2, 0) and (0, negative 1).
C
On a coordinate plane, a line with positive slope goes through points (0, negative 1) and (1, 1).
D
On a coordinate plane, a line with positive slope goes through points (0, negative 1) and (2, 0).
22
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The table represents a linear function. The rate of change between the points (–5, 10) and (–4, 5) is –5. What is the rate of change between the points (–3, 0) and (–2, –5)?xy–510–45–30–2–5
A
–5B
Negative StartFraction 1 Over 5 EndFraction
C
One-fifth
D
523
Lorraine writes the equation shown.She wants to describe the equation using the term relation and the term function.The equation represents
A
a relation and a functionB
a relation but not a functionC
a function but not a relationD
neither a relation nor a function24
Look at the graph. To find the rate of change of the function, Kevin did the following: What was Kevin’s mistake?
A
He incorrectly chose (4,0) as a point on the graph.B
He incorrectly chose (0, 2) as a point on the graph.C
He mixed up the numerator and the denominator of the fraction.D
He subtracted –2 from 0 when he should have added –2 to 0.25
The table below shows the amount that must be repaid, y, when x dollars are borrowed. Amount BorrowedAmount Repaid$100$135$200$260$500$635$800$1,010Which equation represents the relationship?
A
y = StartFraction 5 Over 4 EndFraction x
B
y = StartFraction 4 Over 5 EndFraction x
C
y = StartFraction 5 Over 4 EndFraction x + 10
D
y = StartFraction 4 Over 5 EndFraction x + 55
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